Mutual inductance between two coils, two ways

The same calculation run twice, side by side. Change anything on either side and the difference is shown output by output. This page is a link: both sets of numbers are in the address bar.

Side A open alone

L1 First coil's inductance

The self-inductance of the drive coil.

L2 Second coil's inductance

The self-inductance of the pickup coil.

k Coupling coefficient

1 if every field line from one coil passes through the other; 0 if none do. Falls off quickly with separation and misalignment.

Side B open alone

L1 First coil's inductance

The self-inductance of the drive coil.

L2 Second coil's inductance

The self-inductance of the pickup coil.

k Coupling coefficient

1 if every field line from one coil passes through the other; 0 if none do. Falls off quickly with separation and misalignment.

Swap sides

What changed

The two sides are the same. Change something on either.

Output	A	B	B against A
M Mutual inductance	45 mH	45 mH	same

Side A, with its numbers

45 mH = 0.9 \sqrt{50 mH \cdot 50 mH}

LaTeX

45\,\mathrm{mH} = 0.9 \sqrt{50\,\mathrm{mH} \cdot 50\,\mathrm{mH}}

Side B, with its numbers

45 mH = 0.9 \sqrt{50 mH \cdot 50 mH}

LaTeX

45\,\mathrm{mH} = 0.9 \sqrt{50\,\mathrm{mH} \cdot 50\,\mathrm{mH}}